GULFMARK OFFSHORE INC

CUSIP: 402629208 Class: COMMON STOCK

Walleye Trading LLC's Holding History (CIK: 0001388391)

Note: Option positions (PUT/CALL) are excluded.

Q4 2015
Shares 32,065 Value ($000) $150 Avg Close — Range —
Q2 2015
Shares 955 Value ($000) $11 Avg Close — Range —
Q3 2014
Shares 327 Value ($000) $10 Avg Close — Range —
Q2 2014
Shares 1,522 Value ($000) $69 Avg Close — Range —